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A Search for Long Lived Neutral Particles Decaying to Hadronic States in Proton-proton Collisions in the ATLAS Detector at Sqrt(s)

2017
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Release : 2017
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Book Synopsis A Search for Long Lived Neutral Particles Decaying to Hadronic States in Proton-proton Collisions in the ATLAS Detector at Sqrt(s) by : Rachel Rosten

Download or read book A Search for Long Lived Neutral Particles Decaying to Hadronic States in Proton-proton Collisions in the ATLAS Detector at Sqrt(s) written by Rachel Rosten. This book was released on 2017. Available in PDF, EPUB and Kindle. Book excerpt: A search for the decay of a heavy scalar boson into pairs of long-lived neutral particles in \intlumi of proton proton collisions at $\sqrt{s}=8$~TeV and $3.2~\rm{fb}^{-1}$ at $\sqrt{s}=13$~TeV in the ATLAS detector is presented. The search focuses on final states where both long lived particles decay within the hadronic calorimeter of the detector, resulting in jets with unusual properties. No excess was observed and limits were set on the lifetime of the long lived particles for various combinations of scalar boson and long lived particle masses.

Search for Pair-produced Long-lived Neutral Particles Decaying to Jets in the ATLAS Hadronic Calorimeter in Pp Collisions at √2

2015
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Release : 2015
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Book Synopsis Search for Pair-produced Long-lived Neutral Particles Decaying to Jets in the ATLAS Hadronic Calorimeter in Pp Collisions at √2 by :

Download or read book Search for Pair-produced Long-lived Neutral Particles Decaying to Jets in the ATLAS Hadronic Calorimeter in Pp Collisions at √2 written by . This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: The ATLAS detector at the Large Hadron Collider at CERN is used to search for the decay of a scalar boson to a pair of long-lived particles, neutral under the Standard Model gauge group, in 20.3 fb-1 of data collected in proton-proton collisions at [arrow]"=8 TeV. This research is sensitive to long-lived particles that decay to Standard Model particles producing jets at the outer edge of the ATLAS electromagnetic calorimeter or inside the hadronic calorimeter. No significant excess of events is observed. Limits are reported on the product of the scalar boson production cross section times branching ratio into long-lived neutral particles as a function of the proper lifetime of the particles. Limits are reported for boson masses from 100 GeV to 900 GeV, and a long-lived neutral particle mass from 10 GeV to 150 GeV.

Search for Pair-produced Long-lived Neutral Particles Decaying to Jets in the ATLAS Hadronic Calorimeter in Pp Collisions at {u221A} S

2015
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Release : 2015
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Book Synopsis Search for Pair-produced Long-lived Neutral Particles Decaying to Jets in the ATLAS Hadronic Calorimeter in Pp Collisions at {u221A} S by :

Download or read book Search for Pair-produced Long-lived Neutral Particles Decaying to Jets in the ATLAS Hadronic Calorimeter in Pp Collisions at {u221A} S written by . This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: The ATLAS detector at the Large Hadron Collider at CERN is used to search for the decay of a scalar boson to a pair of long-lived particles, neutral under the Standard Model gauge group, in 20.3 fb-1 of data collected in proton–proton collisions at √s=8 TeV. This search is sensitive to long-lived particles that decay to Standard Model particles producing jets at the outer edge of the ATLAS electromagnetic calorimeter or inside the hadronic calorimeter. No significant excess of events is observed. Limits are reported on the product of the scalar boson production cross section times branching ratio into long-lived neutral particles as a function of the proper lifetime of the particles. Limits are reported for boson masses from 100 GeV to 900 GeV, and a long-lived neutral particle mass from 10 GeV to 150 GeV.

Search for Long-lived, Weakly Interacting Particles that Decay to Displaced Hadronic Jets in Proton-proton Collisions at [arrow]"

2015
Download Search for Long-lived, Weakly Interacting Particles that Decay to Displaced Hadronic Jets in Proton-proton Collisions at [arrow]

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Release : 2015
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Book Synopsis Search for Long-lived, Weakly Interacting Particles that Decay to Displaced Hadronic Jets in Proton-proton Collisions at [arrow]" by :

Download or read book Search for Long-lived, Weakly Interacting Particles that Decay to Displaced Hadronic Jets in Proton-proton Collisions at [arrow]" written by . This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: A search for the decay of neutral, weakly interacting, long-lived particles using data collected by the ATLAS detector at the LHC is presented. This analysis uses the full data set recorded in 2012: 20.3 fb-1 of proton-proton collision data at [arrow]" = 8 TeV. The search employs techniques for reconstructing decay vertices of long-lived particles decaying to jets in the inner tracking detector and muon spectrometer. Signal events require at least two reconstructed vertices. No significant excess of events over the expected background is found, and limits as a function of proper lifetime are reported for the decay of the Higgs boson and other scalar bosons to long-lived particles and for Hidden Valley Z' and Stealth SUSY benchmark models. The first search results for displaced decays in Z' and Stealth SUSY models are presented. The upper bounds of the excluded proper lifetimes are the most stringent to date.

Search for Long-lived, Weakly Interacting Particles that Decay to Displaced Hadronic Jets in Proton-proton Collisions at √s

2016
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Release : 2016
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Book Synopsis Search for Long-lived, Weakly Interacting Particles that Decay to Displaced Hadronic Jets in Proton-proton Collisions at √s by : Preema R. Pais

Download or read book Search for Long-lived, Weakly Interacting Particles that Decay to Displaced Hadronic Jets in Proton-proton Collisions at √s written by Preema R. Pais. This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: Many new physics models predict the existence of neutral, weakly interacting, long-lived particles that can decay within the detector volume, producing a distinctive experimental signature. A search is performed for a pair of such particles, using proton-proton collision data at √s = 8 TeV collected by the ATLAS detector in 2012, corresponding to a total integrated luminosity of 20.3 fb-1. Novel techniques are developed for the reconstruction of displaced decays to hadronic jets in the inner tracking detector and muon spectrometer. No significant deviation is found from the number of background events expected from Standard Model processes. The data are interpreted in terms of Hidden Valley scenarios with a Z' boson mediator. This dissertation presents the first results for a heavy Z' boson decaying to displaced hadronic jets.

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